body {
    background-color: #F3F4F6;
}
.spinner {
    border: 2px solid transparent;
    border-top: 2px solid #1aa17b;
    border-radius: 50%;
    width: 15px;
    height: 15px;
    animation: spin 1s linear infinite;
    margin:0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}